7.3 - 6.9 head switch?
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Posting Guru
Joined: Jan 2003
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From: House Springs, MO
7.3 - 6.9 head switch?
This may have been covered somewhere before, but I'm not sure. After speaking with a friend of mine about the 6.9 and the 7.3, he said that 6.9's were succeptible to blowing head gaskets, which I believe. He said to remedy this take the 6.9 head, drill the holes out, and use larger bolts or studs and steel head gaskets to fix this. Makes sense. Does it work?
Next, is there any possibility/power advantage in a installing 7.3 heads onto a 6.9?
Next, is there any possibility/power advantage in a installing 7.3 heads onto a 6.9?
Elder User
Joined: Oct 2002
Posts: 834
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From: Germany
7.3 - 6.9 head switch?
Hi,
I drive my 6.9 ltr. for 9 years. It has 250k miles on it. I pull heavy trailer and I 've never heard for a blown Head gasekt on a 6.9 if you always have enough cooling fluid in the radiator.
Jens
I drive my 6.9 ltr. for 9 years. It has 250k miles on it. I pull heavy trailer and I 've never heard for a blown Head gasekt on a 6.9 if you always have enough cooling fluid in the radiator.
Jens
Junior User
Joined: Jul 2003
Posts: 86
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7.3 - 6.9 head switch?
ive never heard of a 6,9 ltr blowing head gaskets eather my das has a 6.9 in his 1984 f250 and at 320,000 he finally rebuild the engine and had no problems at all before than and it now has 416,000 total miles on it, its been a hard worker all its life for a construction company and never had problems thats why theres so many miles on it
1975 f150 360 4x2
1975 f150 360 4x2
Senior User
Joined: Jun 2001
Posts: 295
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From: Fort Wayne, IN. USA
7.3 - 6.9 head switch?
Yep head gasket problems on the 6.9 this was fixed with the larger head bolts on the 7.3's.
I don't see why you can't swap the heads if you drill out for the larger bolts. 7/16" vs 1/2"
I don't see why you can't swap the heads if you drill out for the larger bolts. 7/16" vs 1/2"
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